Publication: Georgia Journal of Science
Publication Date: 22-DEC-04
Format: Online - approximately 1230 words
Delivery: Immediate Online Access
Author: Schmude, Richard W., Jr.
Article Excerpt
ABSTRACT
The Moon's brightness dropped by 10.73[+ or -]0.07 and 10.61[+ or -]0.15 magnitudes during the total lunar eclipses on May 16, 2003 and Oct. 28, 2004 respectively. These magnitude drops are close to the corresponding value for the Jan., 2000 total lunar eclipse and indicate that not much change in the transparency of the atmosphere has occurred in the last 4 years.
Key words: total lunar eclipse, photometry.
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INTRODUCTION
A total lunar eclipse occurs when the moon moves into the darkest part of the Earth's shadow (called the umbra). The time when the Moon enters the umbra is called U2 and the time when the Moon begins leaving the umbra is called U3. The respective times for U2 and U3 for eclipse 1 in Universal Time were: 3:14 and 4:06 (1) and the corresponding times for eclipse 2 were: 2:23 and 3:45 (2). During a lunar eclipse, the moon does not become completely dark because the Earth's atmosphere bends a little light towards the Moon. The amount of light reaching the Moon depends on a variety of factors including the temperature, transparency and chemical composition of the atmosphere. In...
NOTE: All illustrations and photos have been removed from this article.
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